Basin mixer



FIG. 1 is a front view of a basin mixer showing our new design;

FIG. 2 is a front left perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top perspective view thereof;

FIG. 5 is a bottom perspective view thereof; and,

FIG. 6 is a right side perspective view thereof.

Views of the basin mixer not shown form no part of the claimed design. 

CLAIM The ornamental design for a basin mixer, as shown and described. 